#6565FB
Closest named color: Medium Slate Blue (#7B68EE). oklch(59.3% 0.218 277.5), rgb(101, 101, 251).
Aa
Black text reads best on this color (4.80:1).
About this color
#6565FB is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.218 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Slate Blue (#7B68EE), ΔE 0.039 away. Black text reads best on it, at 4.80:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.218) |
| Temperature | cool |
| Nearest name | Medium Slate Blue (#7B68EE) |
| Black text | 4.80:1 |
| White text | 4.36:1 |
Values
| HEX | #6565FB |
| RGB | rgb(101, 101, 251) |
| HSL | hsl(240, 95%, 69%) |
| OKLCH | oklch(59.3% 0.218 277.5) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #6565FB | 4.36:1 | AA large text | Lc -75.3 | Fine for body text |
| Black text on #6565FB | 4.80:1 | AA | Lc 34.3 | Non-text elements, placeholder text |
| #6565FB text on white | 4.36:1 | AA large text | Lc 69.8 | Content text, not long reading |
| #6565FB text on black | 4.80:1 | AA | Lc -31.9 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E5E9FD
oklch(93.7% 0.027 276.8)
-
Step 200
200
#D0D7FE
oklch(88.6% 0.054 277.2)
-
Step 300
300
#B1BBFF
oklch(80.9% 0.097 277.5)
-
Step 400
400
#8A95FF
oklch(70.7% 0.154 277.2)
-
Step 500
500
#7075FF
oklch(63.1% 0.201 277.4)
-
Step 600
600 (this color)
#6565FB
oklch(59.3% 0.218 277.5)
-
Step 700
700
#4C47CF
oklch(49% 0.203 277.5)
-
Step 800
800
#3E3CA7
oklch(42.7% 0.167 277.5)
-
Step 900
900
#343585
oklch(37.8% 0.131 277.6)
-
Step 950
950
#1E204E
oklch(27.1% 0.083 277.4)
#6565FB with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #007FFF | 0.082 |
| Deuteranopia (no green cones) | #0072F8 | 0.073 |
| Tritanopia (no blue cones) | #008AA6 | 0.186 |
| Achromatopsia (no color) | #797979 | 0.218 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6565FB
#6565FB
oklch(59.3% 0.218 277.5)
- #927D00
#927D00
oklch(59.1% 0.122 97.3)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #6565FB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Slate Blue #7B68EE ΔE 0.039
- Cornflower #6A79F7 ΔE 0.048
- Neon Blue #4361EE ΔE 0.049
- Royal Blue #4169E1 ΔE 0.059
- Dark Periwinkle #665FD1 ΔE 0.064
- Purpley #8756E4 ΔE 0.067
- Clear Blue #247AFD ΔE 0.069
- Warm Blue #4B57DB ΔE 0.070
Use #6565FB in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.